Partial Lock Mode for Touchscreen Input Filtering
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Solution Overview
Problem
Touch-sensitive displays on devices like mobile phones and tablets are prone to accidental operations, leading to unintended actions when used in situations like walking, where conventional lock modes are not suitable as they require manual unlocking sequences.
Innovation Solution
Implementing a partial lock mode that allows continued interaction with displayed content by modifying user inputs and gestures, which can be switched to automatically based on sensors detecting motion or manually through hardware/software switches, without replacing the current content with a screensaver or blank screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lock mode is used to prevent accidental operation, then the risk of accidental operation is reduced, but the user must manually exit the lock mode through a series of unlocking inputs which reduces ease of operation
Solution Approach 1:
The lock mode is segmented into different levels: a first lock mode that blocks all user inputs except a specific sequence, and a second lock mode that blocks only specific types of inputs (e.g., single taps) while allowing others (e.g., multi-touch gestures). This segmentation allows the system to provide targeted protection against accidental operations while maintaining ease of operation for intended actions.
Solution Approach 2:
The system dynamically switches between different lock modes based on detected conditions (e.g., motion sensors detecting walking). When the terminal is stationary, it operates in the more restrictive first lock mode; when motion is detected, it transitions to the less restrictive second lock mode, automatically adapting to the user's situation without requiring manual intervention.
2Reliability
If lock mode replaces displayed content with a screensaver or blank screen, then accidental operation is prevented, but the current content is lost and user productivity is reduced
Solution Approach 1:
Instead of uniformly blocking all inputs or replacing the entire display, the second lock mode applies selective blocking to specific input types while allowing other interactions to proceed. For example, single taps may be blocked while multi-touch gestures remain functional, enabling users to continue interacting with content in a controlled manner that maintains productivity while preventing accidents.
Solution Approach 2:
The second lock mode implements partial blocking of inputs rather than complete blocking. It selectively prevents certain types of inputs that are more likely to be accidental (e.g., single taps during motion) while allowing other inputs that are less likely to be accidental or more useful for continued interaction (e.g., deliberate multi-touch gestures).
Data Source
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AI summary
A terminal is configured to switch from an unlocked mode in which a first set of user interactions can be made through a user interface to effect certain functions, to a partial lock mode in which a different set of user interactions are made available to the user in relation to the same, or substantially similar, displayed content. Switching does not cause the currently-displayed content to entirely disappear, as in a conventional transition to a lock mode, but rather the same or substantially the same content continues to be displayed. Switching between the modes can take place in response to manual selection, for example using a hardware or software switch, or can take place automatically in response to one or more sensors of the apparatus detecting a predetermined operating condition, e.g. the user being in motion.